The $200 m$ free style women's swimming gold medal at Seol Olympic $1988$ went to Heike Friendrich of Each Germany when she set a new Olympic record of $1$ minute and $57.56$ seconds. Assume that she covered most of the distance with a uniform speed and had to exert $460 W$ to maintain her speed. Calculate the average force of resistance offered by the water during the swim.

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Solution

Power = Force $\times$ velocity
velocity = $\frac{200 m}{117.56 s e c}$

$= 1.7012 m / s$

So Force = $\frac{460}{1.7012} N$

$F o r c e = 270.33 N$

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Power = Force × velocityvelocity = 200m117.56sec =1.7012m/sSo Force = 4601.7012N Force=270.33N

Power = Force $\times$ velocity
velocity = $\frac{200 m}{117.56 s e c}$

$= 1.7012 m / s$

So Force = $\frac{460}{1.7012} N$

$F o r c e = 270.33 N$